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Ye J, Zhang F, Luo Z, Ou X. Comparative salivary proteomics analysis of children with and without early childhood caries using the DIA approach: A pilot study. Proteomics Clin Appl 2024:e2400006. [PMID: 38769866 DOI: 10.1002/prca.202400006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/01/2024] [Accepted: 04/17/2024] [Indexed: 05/22/2024]
Abstract
OBJECTIVE To screen differentially expressed proteins (DEPs) in the saliva of Early childhood caries (ECC) with different degrees of severity. METHODS The proteomic profiles of salivary of children with ECC of varying severity by data independent acquisition data independent acquisition (DIA) technique. A total of 12 preschool children aged 3-5 years were included in this study. RESULTS In this study, a total of 15,083 peptides and 1944 proteins were quantified; The results of DEPs screening showed that 34 DEPs were identified between the group H and the group LC, including 18 up-regulated proteins and 16 down-regulated proteins; 34 DEPs were screened between the group H and the group HC, including 17 up-regulated proteins and 17 down-regulated proteins; 42 DEPs were screened between the group LC and the group HC, including 18 up-regulated proteins and 24 down-regulated proteins. Among these DEPs, we screened several key proteins that may play a role in ECC, such as MK, histone H4, TGFβ3, ZG16B, MUC20, and SMR-3B. CONCLUSION Salivary proteins, as important host factors of caries, are differentially expressed between the saliva of ECC children and healthy children. Specific DEPs are expected to become potential biomarkers for the diagnosis of ECC.
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Affiliation(s)
- Jinxiang Ye
- The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University & Jiangxi Province Key Laboratory of Oral Biomedicine & Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Fangfang Zhang
- The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University & Jiangxi Province Key Laboratory of Oral Biomedicine & Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Zhouyuan Luo
- The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University & Jiangxi Province Key Laboratory of Oral Biomedicine & Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Xiaoyan Ou
- The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University & Jiangxi Province Key Laboratory of Oral Biomedicine & Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
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2
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Shamszadeh S, Shirvani A, Torabzadeh H, Asgary S. Effects of Growth Factors on the Differentiation of Dental Stem Cells: A Systematic Review and Meta-analysis (Part I). Curr Stem Cell Res Ther 2024; 19:523-543. [PMID: 35762556 DOI: 10.2174/1574888x17666220628125048] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/04/2022] [Accepted: 04/22/2022] [Indexed: 11/22/2022]
Abstract
INTRODUCTION To evaluate the biological interaction between dental stem cells (DSCs) and different growth factors in the field of regenerative endodontics. METHODS A systematic search was conducted in the electronic databases up to October 2021. This study followed the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines. Ex vivo studies evaluating the biological interactions of DSCs and growth factors were included. The meta-analysis was performed according to the type of growth factor. The outcomes were cell viability/ proliferation and mineralization. Standardized mean differences (SMDs) were estimated using the random-effect maximum-likelihood method (P < .05). Additional analysis was performed to find any potential source of heterogeneity. RESULTS Twenty articles were included in the systematic review; meta-analysis was performed for fibroblast growth factor-2 (FGF-2) and Transforming growth factor-ß1 (TGF-β1) (n = 5). Results showed that use of FGF-2 significantly increased cell proliferation on day 1-(SMD = 3.56, P = 0.00), 3-(SMD = 9.04, P = 0.00), 5-(SMD = 8.37, P = 0.01), and 7 (SMD=8.51, P=0.00) than the control group. TGF-ß1 increased alkaline phosphatase (ALP) activity more than control only on day 3 (SMD = 3.68, P = 0.02). TGF-β1 had no significant effect on cell proliferation on days 1 and 3 (P > 0.05) and on ALP activity on days 5 and 7 (P > 0.05). Meta-regression analysis showed that different covariates (i.e., cell type, passage number, and growth factors' concentration) could significantly influence the effect sizes at different follow- ups (P < 0.05). CONCLUSION Specific growth factors might enhance the proliferation and mineralization of DSCs; however, the obtained evidence was weak. Due to the high heterogeneity among the included studies, other growth factors' inhibitory/stimulatory effects on DSCs could not be evaluated.
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Affiliation(s)
- Sayna Shamszadeh
- Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Armin Shirvani
- Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hassan Torabzadeh
- Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Asgary
- Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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3
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Ishikawa M, Kanzaki H, Kodera R, Sekimizu T, Wada S, Tohyama S, Ida T, Shimoyama M, Manase S, Tomonari H, Kuroda N. Early diagnosis of aortic calcification through dental X-ray examination for dental pulp stones. Sci Rep 2023; 13:18576. [PMID: 37903847 PMCID: PMC10616172 DOI: 10.1038/s41598-023-45902-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 10/25/2023] [Indexed: 11/01/2023] Open
Abstract
Vascular calcification, an ectopic calcification exacerbated by aging and renal dysfunction, is closely associated with cardiovascular disease. However, early detection indicators are limited. This study focused on dental pulp stones, ectopic calcifications found in oral tissues that are easily identifiable on dental radiographs. Our investigation explored the frequency and timing of these calcifications in different locations and their relationship to aortic calcification. In cadavers, we examined the association between the frequency of dental pulp stones and aortic calcification, revealing a significant association. Notably, dental pulp stones appeared prior to aortic calcification. Using a rat model of hyperphosphatemia, we confirmed that dental pulp stones formed earlier than calcification in the aortic arch. Interestingly, there were very few instances of aortic calcification without dental pulp stones. Additionally, we conducted cell culture experiments with vascular smooth muscle cells (SMCs) and dental pulp cells (DPCs) to explore the regulatory mechanism underlying high phosphate-mediated calcification. We found that DPCs produced calcification deposits more rapidly and exhibited a stronger augmentation of osteoblast differentiation markers compared with SMCs. In conclusion, the observation of dental pulp stones through X-ray examination during dental checkups could be a valuable method for early diagnosis of aortic calcification risk.
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Affiliation(s)
- Misao Ishikawa
- Department of Anatomy, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa Pref., 230-8501, Japan.
| | - Hiroyuki Kanzaki
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Ryo Kodera
- Department of Anatomy, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa Pref., 230-8501, Japan
| | - Takehiro Sekimizu
- Department of Anatomy, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa Pref., 230-8501, Japan
| | - Satoshi Wada
- Department of Oral and Maxillofacial Surgery, Kanazawa Medical University, Kanazawa, Japan
| | - Syunnosuke Tohyama
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Tomomi Ida
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Miho Shimoyama
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Shugo Manase
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Hiroshi Tomonari
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan
| | - Noriyuki Kuroda
- Department of Anatomy, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa Pref., 230-8501, Japan
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Matsubara T, Iga T, Sugiura Y, Kusumoto D, Sanosaka T, Tai-Nagara I, Takeda N, Fong GH, Ito K, Ema M, Okano H, Kohyama J, Suematsu M, Kubota Y. Coupling of angiogenesis and odontogenesis orchestrates tooth mineralization in mice. J Exp Med 2022; 219:213091. [PMID: 35319724 PMCID: PMC8952600 DOI: 10.1084/jem.20211789] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/25/2021] [Accepted: 02/17/2022] [Indexed: 12/18/2022] Open
Abstract
The skeletal system consists of bones and teeth, both of which are hardened via mineralization to support daily physical activity and mastication. The precise mechanism for this process, especially how blood vessels contribute to tissue mineralization, remains incompletely understood. Here, we established an imaging technique to visualize the 3D structure of the tooth vasculature at a single-cell level. Using this technique combined with single-cell RNA sequencing, we identified a unique endothelial subtype specialized to dentinogenesis, a process of tooth mineralization, termed periodontal tip-like endothelial cells. These capillaries exhibit high angiogenic activity and plasticity under the control of odontoblasts; in turn, the capillaries trigger odontoblast maturation. Metabolomic analysis demonstrated that the capillaries perform the phosphate delivery required for dentinogenesis. Taken together, our data identified the fundamental cell-to-cell communications that orchestrate tooth formation, angiogenic–odontogenic coupling, a distinct mechanism compared to the angiogenic–osteogenic coupling in bones. This mechanism contributes to our understanding concerning the functional diversity of organotypic vasculature.
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Affiliation(s)
- Tomoko Matsubara
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan
| | - Takahito Iga
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan.,Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Yuki Sugiura
- Department of Biochemistry, Keio University School of Medicine, Tokyo, Japan
| | - Dai Kusumoto
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Tsukasa Sanosaka
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Ikue Tai-Nagara
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan
| | - Norihiko Takeda
- Division of Cardiology and Metabolism, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Guo-Hua Fong
- Center for Vascular Biology, University of Connecticut School of Medicine, Farmington, CT.,Department of Cell Biology, University of Connecticut School of Medicine, Farmington, CT
| | - Kosei Ito
- Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Masatsugu Ema
- Depart of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science, Shiga, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Jun Kohyama
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Makoto Suematsu
- Department of Biochemistry, Keio University School of Medicine, Tokyo, Japan
| | - Yoshiaki Kubota
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan
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Virdee SS, Bashir N, Camilleri J, Cooper PR, Tomson P. Exploiting dentine matrix proteins in cell-free approaches for periradicular tissue engineering. TISSUE ENGINEERING PART B-REVIEWS 2021; 28:707-732. [PMID: 34309453 PMCID: PMC9419954 DOI: 10.1089/ten.teb.2021.0074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The recent discovery of mesenchymal stem cells within periapical lesions (PL-MSC) has presented novel opportunities for managing periradicular diseases in adult teeth by way of enhancing tissue regeneration. This discovery coincides with the current paradigm shift toward biologically driven treatment strategies in endodontics, which have typically been reserved for non-vital immature permanent teeth. One such approach that shows promise is utilizing local endogenous non-collagenous dentine extracellular matrix components (dECM) to recruit and upregulate the intrinsic regenerative capacity of PL-MSCs in situ. At picogram levels, these morphogens have demonstrated tremendous ability to enhance the cellular activities in in vitro and in vivo animal studies that would otherwise be necessary for periradicular regeneration. Briefly, these include proliferation, viability, migration, differentiation, and mineralization. Therefore, topical application of dECMs during ortho- or retrograde root canal treatment could potentially enhance and sustain the regenerative mechanisms within diseased periapical tissues that are responsible for attaining favorable clinical and radiographic outcomes. This would provide many advantages when compared with conventional antimicrobial-only therapies for apical periodontitis (AP), which do not directly stimulate healing and have had stagnant success rates over the past five decades despite significant advances in operative techniques. The aim of this narrative review was to present the novel concept of exploiting endogenous dECMs as clinical tools for treating AP in mature permanent teeth. A large scope of literature was summarized to discuss the issues associated with conventional treatment modalities; current knowledge surrounding PL-MSCs; composition of the dECM; inductive potentials of dECM morphogens in other odontogenic stem cell niches; how treatment protocols can be adapted to take advantage of dECMs and PL-MSCs; and finally, the challenges currently impeding successful clinical translation alongside directions for future research.
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Affiliation(s)
- Satnam Singh Virdee
- University of Birmingham, 1724, School of Dentistry, Birmingham, West Midlands, United Kingdom of Great Britain and Northern Ireland;
| | - Nasir Bashir
- University of Birmingham, 1724, School of Dentistry, Birmingham Dental Hospital and School of Dentistry, 5 Mill Pool Way, Edgbaston, Birmingham, United Kingdom of Great Britain and Northern Ireland, B5 7SA;
| | - Josette Camilleri
- University of Birmingham, 1724, School of Dentistry, Birmingham, West Midlands, United Kingdom of Great Britain and Northern Ireland;
| | - Paul R Cooper
- University of Otago, 2495, Faculty of Dentistry, Dunedin, New Zealand;
| | - Phillip Tomson
- University of Birmingham College of Medical and Dental Sciences, 150183, School of Dentistry, Institute of Clinical Sciences, 5 Mill Pool Way, Edgbaston, Birmingham, Birmingham, Birmingham, United Kingdom of Great Britain and Northern Ireland, B5 7EG.,University of Birmingham;
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Abbass MMS, El-Rashidy AA, Sadek KM, Moshy SE, Radwan IA, Rady D, Dörfer CE, Fawzy El-Sayed KM. Hydrogels and Dentin-Pulp Complex Regeneration: From the Benchtop to Clinical Translation. Polymers (Basel) 2020; 12:E2935. [PMID: 33316886 PMCID: PMC7763835 DOI: 10.3390/polym12122935] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/08/2020] [Accepted: 11/10/2020] [Indexed: 02/06/2023] Open
Abstract
Dentin-pulp complex is a term which refers to the dental pulp (DP) surrounded by dentin along its peripheries. Dentin and dental pulp are highly specialized tissues, which can be affected by various insults, primarily by dental caries. Regeneration of the dentin-pulp complex is of paramount importance to regain tooth vitality. The regenerative endodontic procedure (REP) is a relatively current approach, which aims to regenerate the dentin-pulp complex through stimulating the differentiation of resident or transplanted stem/progenitor cells. Hydrogel-based scaffolds are a unique category of three dimensional polymeric networks with high water content. They are hydrophilic, biocompatible, with tunable degradation patterns and mechanical properties, in addition to the ability to be loaded with various bioactive molecules. Furthermore, hydrogels have a considerable degree of flexibility and elasticity, mimicking the cell extracellular matrix (ECM), particularly that of the DP. The current review presents how for dentin-pulp complex regeneration, the application of injectable hydrogels combined with stem/progenitor cells could represent a promising approach. According to the source of the polymeric chain forming the hydrogel, they can be classified into natural, synthetic or hybrid hydrogels, combining natural and synthetic ones. Natural polymers are bioactive, highly biocompatible, and biodegradable by naturally occurring enzymes or via hydrolysis. On the other hand, synthetic polymers offer tunable mechanical properties, thermostability and durability as compared to natural hydrogels. Hybrid hydrogels combine the benefits of synthetic and natural polymers. Hydrogels can be biofunctionalized with cell-binding sequences as arginine-glycine-aspartic acid (RGD), can be used for local delivery of bioactive molecules and cellularized with stem cells for dentin-pulp regeneration. Formulating a hydrogel scaffold material fulfilling the required criteria in regenerative endodontics is still an area of active research, which shows promising potential for replacing conventional endodontic treatments in the near future.
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Affiliation(s)
- Marwa M. S. Abbass
- Oral Biology Department, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (M.M.S.A.); (S.E.M.); (I.A.R.); (D.R.)
- Stem Cells and Tissue Engineering Research Group, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (A.A.E.-R.); (K.M.S.)
| | - Aiah A. El-Rashidy
- Stem Cells and Tissue Engineering Research Group, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (A.A.E.-R.); (K.M.S.)
- Biomaterials Department, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt
| | - Khadiga M. Sadek
- Stem Cells and Tissue Engineering Research Group, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (A.A.E.-R.); (K.M.S.)
- Biomaterials Department, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt
| | - Sara El Moshy
- Oral Biology Department, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (M.M.S.A.); (S.E.M.); (I.A.R.); (D.R.)
- Stem Cells and Tissue Engineering Research Group, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (A.A.E.-R.); (K.M.S.)
| | - Israa Ahmed Radwan
- Oral Biology Department, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (M.M.S.A.); (S.E.M.); (I.A.R.); (D.R.)
- Stem Cells and Tissue Engineering Research Group, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (A.A.E.-R.); (K.M.S.)
| | - Dina Rady
- Oral Biology Department, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (M.M.S.A.); (S.E.M.); (I.A.R.); (D.R.)
- Stem Cells and Tissue Engineering Research Group, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (A.A.E.-R.); (K.M.S.)
| | - Christof E. Dörfer
- Clinic for Conservative Dentistry and Periodontology, School of Dental Medicine, Christian Albrechts University, 24105 Kiel, Germany;
| | - Karim M. Fawzy El-Sayed
- Stem Cells and Tissue Engineering Research Group, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt; (A.A.E.-R.); (K.M.S.)
- Clinic for Conservative Dentistry and Periodontology, School of Dental Medicine, Christian Albrechts University, 24105 Kiel, Germany;
- Oral Medicine and Periodontology Department, Faculty of Dentistry, Cairo University, Cairo 11562, Egypt
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Devi Praja V, Muttath AL, Duraisamy V, Selvarajan NB, Suresh Kumar V, Baby John J. A Clinical and Radiographic Comparison of Platelet-rich Fibrin and Lyophilized Platelet-derived Preparation as Pulpotomy Agent in Primary Molars. J Pharm Bioallied Sci 2020; 12:S155-S160. [PMID: 33149448 PMCID: PMC7595511 DOI: 10.4103/jpbs.jpbs_48_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/24/2020] [Accepted: 03/09/2020] [Indexed: 12/04/2022] Open
Abstract
Introduction: Vital pulpotomy in primary molar teeth is aimed to retain the tooth in function until it is replaced by its successors. Aim: The aim of this study was to evaluate and compare platelet-rich fibrin (PRF) and lyophilized platelet-derived preparation (LPDP) as a pulpotomy agent in primary molars. Materials and Methods: Forty primary molars from 20 healthy children aged 5–9 years requiring pulpotomy in the contralateral side of mandible were randomly selected. In both the groups, pulpotomy was carried out by removing coronal pulp and achieving hemostasis, the radicular part of pulp tissue was packed with PRF preparation in Group I and LPDP (Mothercell Research Centre, Trichy, Tamil Nadu, India) in Group II. The teeth were restored with zinc oxide eugenol and glass ionomer cement (GIC), followed by stainless steel crown in the same visit. Clinical and radiographic evaluation was undertaken at 1, 3, and 6 months interval. Results: The overall success rate was 90% in PRF group and 95% in LPDP group at the end of 6 months. The results were statistically nonsignificant between the groups (P > 0.05). Conclusion: The overall outcome of the study suggests that PRF and LPDP are acceptable pulpotomy agents and are promising in the era of new vital pulp therapy procedure.
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Affiliation(s)
- V Devi Praja
- Department of Pediatric and Preventive Dentistry, Vinayaka Mission's Sankarachariyar Dental College, Vinayaka Missions Research Foundation-Deemed to be University, Salem, Tamil Nadu, India
| | - Anil L Muttath
- Department of Pediatric and Preventive Dentistry, Vinayaka Mission's Sankarachariyar Dental College, Vinayaka Missions Research Foundation-Deemed to be University, Salem, Tamil Nadu, India
| | - Vinola Duraisamy
- Department of Pediatric and Preventive Dentistry, Vinayaka Mission's Sankarachariyar Dental College, Vinayaka Missions Research Foundation-Deemed to be University, Salem, Tamil Nadu, India
| | - Nandhini B Selvarajan
- Department of Pediatric and Preventive Dentistry, Vinayaka Mission's Sankarachariyar Dental College, Vinayaka Missions Research Foundation-Deemed to be University, Salem, Tamil Nadu, India
| | - V Suresh Kumar
- Department of Pediatric and Preventive Dentistry, Vinayaka Mission's Sankarachariyar Dental College, Vinayaka Missions Research Foundation-Deemed to be University, Salem, Tamil Nadu, India
| | - John Baby John
- Department of Pediatric and Preventive Dentistry, Vinayaka Mission's Sankarachariyar Dental College, Vinayaka Missions Research Foundation-Deemed to be University, Salem, Tamil Nadu, India
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Rathinam E, Govindarajan S, Rajasekharan S, Declercq H, Elewaut D, De Coster P, Martens L. Transcriptomic profiling of human dental pulp cells treated with tricalcium silicate-based cements by RNA sequencing. Clin Oral Investig 2020; 25:3181-3195. [PMID: 33108483 DOI: 10.1007/s00784-020-03647-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 10/15/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Tricalcium silicate (TCS)-based biomaterials induce differentiation of human dental pulp cells (hDPCs) into odontoblasts/osteoblasts, which is regulated by the interplay between various intracellular pathways and their resultant secretome. The aim of this study was to compare the transcriptome-wide effects by next-generation RNA sequencing of custom-prepared hDPCs stimulated with TCS-based biomaterials: ProRoot white MTA (WMTA) (Dentsply, Tulsa; Tulsa, OK) and Biodentine (Septodont, Saint Maur des Fosses, France). METHODS Self-isolated hDPCs were seeded in a 6-well plate at a density of 5 × 105 cells per well. ProRoot white MTA and Biodentine were then placed in transwell inserts with a pore size of 0.4 μm and inserted in the well plate. RNA sequencing was performed after 3 and 7 days treatment. For post-validation, RT-PCR analyses were done on some of the RNA samples used for RNA sequencing. RESULTS Our RNA sequencing results for the first time identified 7533 differentially expressed genes (DEGs) between different treatments and the number of DEGs in Biodentine was higher than ProRoot WMTA at both 3 and 7 days. Despite their differential gene expression, both the TCS-based biomaterial treatments showed gene expressions mainly involved in odontoblast differentiation, angiogenesis, neurogenesis, dentinogenesis, and tooth mineralization. CONCLUSIONS The results of the present study illustrate that several important signalling pathways are induced by hDPCs stimulated with TCS-based biomaterials. CLINICAL RELEVANCE The differential expression of the genes associated with odontogenesis, angiogenesis, neurogenesis, dentinogenesis, and mineralization may affect the prognosis of teeth treated with Biodentine or ProRoot white MTA.
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Affiliation(s)
- Elanagai Rathinam
- Department of Paediatric Dentistry & Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.
| | - Srinath Govindarajan
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, Zwijnaarde, 9052, Ghent, Belgium
| | - Sivaprakash Rajasekharan
- Department of Paediatric Dentistry & Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Heidi Declercq
- Tissue Engineering and Biomaterials Group, Department of Human Structure and Repair, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, 8500, Kortrijk, Belgium
| | - Dirk Elewaut
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, Zwijnaarde, 9052, Ghent, Belgium
| | - Peter De Coster
- Department of Reconstructive Dentistry and Oral Biology, Dental School, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Luc Martens
- Department of Paediatric Dentistry & Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
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9
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Use of in vitro bone models to screen for altered bone metabolism, osteopathies, and fracture healing: challenges of complex models. Arch Toxicol 2020; 94:3937-3958. [PMID: 32910238 PMCID: PMC7655582 DOI: 10.1007/s00204-020-02906-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/03/2020] [Indexed: 02/06/2023]
Abstract
Approx. every third hospitalized patient in Europe suffers from musculoskeletal injuries or diseases. Up to 20% of these patients need costly surgical revisions after delayed or impaired fracture healing. Reasons for this are the severity of the trauma, individual factors, e.g, the patients’ age, individual lifestyle, chronic diseases, medication, and, over 70 diseases that negatively affect the bone quality. To investigate the various disease constellations and/or develop new treatment strategies, many in vivo, ex vivo, and in vitro models can be applied. Analyzing these various models more closely, it is obvious that many of them have limits and/or restrictions. Undoubtedly, in vivo models most completely represent the biological situation. Besides possible species-specific differences, ethical concerns may question the use of in vivo models especially for large screening approaches. Challenging whether ex vivo or in vitro bone models can be used as an adequate replacement for such screenings, we here summarize the advantages and challenges of frequently used ex vivo and in vitro bone models to study disturbed bone metabolism and fracture healing. Using own examples, we discuss the common challenge of cell-specific normalization of data obtained from more complex in vitro models as one example of the analytical limits which lower the full potential of these complex model systems.
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10
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Kawase-Koga Y, Fujii Y, Yamakawa D, Sato M, Chikazu D. Identification of neurospheres generated from human dental pulp stem cells in xeno-/serum-free conditions. Regen Ther 2020; 14:128-135. [PMID: 32099873 PMCID: PMC7029376 DOI: 10.1016/j.reth.2019.11.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/08/2019] [Accepted: 11/30/2019] [Indexed: 01/09/2023] Open
Abstract
Introduction Cell-based therapies require an emerging alternative treatment using easily harvested cell sources. Neural stem cells derived from various tissues, including brain, bone marrow, skin and retina can give rise to both neurons and glial cells. Recently, human dental pulp stem cells (DPSCs) and stem cells from human exfoliated deciduous teeth (SHED) were demonstrated to have mesenchymal stem cell-like abilities such as self-renewal and multi-lineage differentiation, including neuron and glial cells. Moreover, DPSCs and SHED show a higher proliferation rate and a higher number of population doublings compared with adult bone marrow stromal stem cells. Therefore, DPSCs are a useful source that can be applied in cell replacement therapy for various neurological disorders. Generally, the conventional culture methods for DPSCs have used serum, therefore the undefined components in culture medium may complicate investigations of the molecular mechanisms that control the self-renewal and differentiation of DPSCs. However, neural stem cells proliferate to form ‘neurospheres’ in suspension in vitro in the presence of epidermal growth factor (EGF) and basic fibroblast growth factor (bFGF). No study to date has obtained neurospheres from DPSCs in serum-free conditions in primary culture. Thus, the aim of this study was to establish a method for the proliferation and neural differentiation of DPSCs in xeno- and serum-free conditions in primary culture. Methods DPSCs were obtained from the dental pulp of wisdom teeth from healthy individuals (18–41 years old) and cultured in conventional medium containing 15% fetal bovine serum and xeno-/serum-free medium. We evaluated the proliferation of DPSCs, neurosphere generation, and neural differentiation under xeno-/serum-free conditions by flow cytometry, immunohistochemistry, and real-time polymerase chain reaction. Results In proliferation medium without xeno/serum, DPSCs can proliferate and generate neurospheres, however, the neurospheres had limited self-renewal ability. Under differentiation conditions, class III β-tubulin (TUBB3) and microtubule-associated protein (MAP2) were more significantly expressed in neurospheres derived from DPSCs in xeno-/serum-free culture conditions than in DPSCs in conventional culture conditions. Conclusions Our result demonstrated that neurosphere generation from DPSCs in xeno-/serum-free culture may be an accessible source for clinical cell replacement therapies for neuronal degenerative diseases. Human dental pulp stem cells proliferate in proliferation medium without xeno/serum. Neurosphere generates from human dental pulp stem cells in xeno-/serum-free culture. Neurosphere from human dental pulp stem cells can differentiate into neuron.
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Affiliation(s)
- Yoko Kawase-Koga
- Department of Oral and Maxillofacial Surgery, Tokyo Medical University Hospital, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan
| | - Yasuyuki Fujii
- Department of Oral and Maxillofacial Surgery, Tokyo Medical University Hospital, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan.,Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, University of Connecticut Health, Farmington, CT, 06030, United States
| | - Daiki Yamakawa
- Department of Oral and Maxillofacial Surgery, Tokyo Medical University Hospital, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan
| | - Marika Sato
- Department of Oral and Maxillofacial Surgery, Tokyo Medical University Hospital, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan
| | - Daichi Chikazu
- Department of Oral and Maxillofacial Surgery, Tokyo Medical University Hospital, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan
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11
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Wattanapakkavong K, Srisuwan T. Release of Transforming Growth Factor Beta 1 from Human Tooth Dentin after Application of Either ProRoot MTA or Biodentine as a Coronal Barrier. J Endod 2019; 45:701-705. [DOI: 10.1016/j.joen.2019.03.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/08/2019] [Accepted: 03/16/2019] [Indexed: 12/28/2022]
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12
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Contraction dynamics of dental pulp cell rod microtissues. Clin Oral Investig 2019; 24:631-638. [PMID: 31115693 DOI: 10.1007/s00784-019-02917-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/26/2019] [Indexed: 10/26/2022]
Abstract
OBJECTIVES The factors that contribute to the morphological changes of dental pulp cell-derived microtissues are unknown. Here, we investigated the contraction dynamics of rod-shaped microtissues derived from dental pulp cells and examined the underlying cell signaling pathways. METHODS Human dental pulp cells were seeded into agarose molds to assemble into rod-shaped microtissues. Resazurin- and tetrazolium-based cytotoxicity assays, Live/Dead staining, and hematoxylin and eosin staining for histological evaluation of rods were performed. Rod contraction was evaluated and measured for a period of 10 days. The role of TGF-β, phosphoinositide 3-kinase (PI3K)/AKT, and mitogen-activated protein kinase (MAPK) signaling pathway was analyzed. RESULTS Dental pulp cells readily assembled into rods, maintaining the geometric shape for 48 h. Following this period, they condensed to form stable spheroidal structures that remained vital for 10 days from seeding. Inhibition of phosphoinositide 3-kinase signaling pathway by LY294002 significantly prolonged the diminution in the length of rods formed by dental pulp cells. TGF-β and pharmacological inhibition of TGF-β signaling did not show pronounced effects. CONCLUSION Overall, dental pulp cells readily formed rod-shaped patterns of microtissues which, over a period of time, condensed into more stable spheroidal structures. Hence, technologies like bioprinting, using direct fabrication of microtissues need to consider the contraction dynamics. CLINICAL RELEVANCE The field of regenerative endodontology will benefit from our findings as it can be applied as a novel platform to test the impact of pharmacological agents, biomaterials, and regenerative approaches including bioprinting.
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13
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Kang KJ, Ryu CJ, Jang YJ. Identification of dentinogenic cell-specific surface antigens in odontoblast-like cells derived from adult dental pulp. Stem Cell Res Ther 2019; 10:128. [PMID: 31029165 PMCID: PMC6487011 DOI: 10.1186/s13287-019-1232-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 04/05/2019] [Accepted: 04/08/2019] [Indexed: 01/09/2023] Open
Abstract
Background Odontoblast is a unique progenitor that plays a role in dentin formation. So far, the dentinogenic differentiation of dental pulp stem cells and the role of surface molecules of odontoblasts in dentinogenesis are not well known yet. In this study, we obtained odontoblast-like cells from human dental pulp cells and screened odontoblast-specific cell surface antigens by decoy immunization. Methods Through decoy immunization with intact odontoblast-like cells derived from human dental pulp cells, we constructed 12 monoclonal antibodies (mAbs) of IgG type, and their binding affinities for cell surface of odontoblast-like cells were analyzed by flow cytometry. Immunoprecipitation, mass spectrometry, and immunohistochemistry were performed to demonstrate odontoblast-specific antigens. Odontoblasts were sorted by these mAbs using magnetic-activated cell sorting system, and their mineralization efficiency was increased after sorting. Results We constructed 12 mAbs of IgG type, which had a strong binding affinity for cell surface antigens of odontoblast-like cells. In human adult tooth, these mAbs accumulated in the odontoblastic layer between dentin and pulp and in the perivascular region adjacent to the blood vessels in the pulp core. Cell surface expression of the antigenic molecules was increased during odontogenic cytodifferentiation and decreased gradually as dentinogenic maturation progressed. Proteomic analysis showed that two representative antigenic molecules, OD40 and OD46, had the potential to be components for cell adhesion and extracellular matrix structures. Conclusion These results suggest that mAbs will be useful for detecting and separating odontoblasts from the primary pulp cells and other lineage cells and will provide information on the structures of extracellular matrix and microenvironment that appears during the dentinogenic differentiation. Electronic supplementary material The online version of this article (10.1186/s13287-019-1232-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kyung-Jung Kang
- Department of Nanobiomedical Science and BK21 PLUS Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, South Korea
| | - Chun-Jeih Ryu
- Department of Integrative Bioscience and Biotechnology, Institute of Anticancer Medicine Development, Sejong University, Seoul, 05006, South Korea
| | - Young-Joo Jang
- Department of Nanobiomedical Science and BK21 PLUS Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, South Korea.
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14
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Petridis X, Beems BP, Tomson PL, Scheven B, Giepmans BNG, Kuipers J, van der Sluis LWM, Harmsen MC. Effect of Dentin Matrix Components on the Mineralization of Human Mesenchymal Stromal Cells. Tissue Eng Part A 2018; 25:1104-1115. [PMID: 30444193 DOI: 10.1089/ten.tea.2018.0192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
IMPACT STATEMENT This research has been conducted with the aim to contribute to the development of treatment modalities for the reconstruction of lost/damaged mineralized tissues. Currently, determining the most appropriate stromal cell population and signaling cues stands at the core of developing effective treatments. We provide new insights into the effect of innate inductive cues found in human dentin matrix components, on the osteogenic differentiation of various human stromal cell types. The effects of dentin extracellular matrix components on umbilical cord mesenchymal stromal cells have not been investigated before. The findings of this study could underpin translational research based on the development of techniques for mineralized tissue engineering and will be of great interest for the readership of Tissue Engineering Part A.
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Affiliation(s)
- Xenos Petridis
- 1Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Bas P Beems
- 1Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Phillip L Tomson
- 2School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Ben Scheven
- 2School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Ben N G Giepmans
- 3Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jeroen Kuipers
- 3Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Luc W M van der Sluis
- 1Center for Dentistry and Oral Hygiene, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Martin C Harmsen
- 4Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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15
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Early responses of human pulp to direct capping with resin adhesive systems and calcium hydroxide. Dent Mater 2018; 34:e73-e82. [DOI: 10.1016/j.dental.2018.01.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 12/20/2017] [Accepted: 01/16/2018] [Indexed: 11/21/2022]
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16
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Xiao N, Yu WY, Liu D. Glial cell‐derived neurotrophic factor promotes dental pulp stem cell migration. J Tissue Eng Regen Med 2017; 12:705-714. [DOI: 10.1002/term.2490] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 04/27/2017] [Accepted: 06/01/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Nan Xiao
- Department of Biomedical Sciences, Arthur A. Dugoni School of DentistryUniversity of the Pacific San Francisco CA USA
| | - Wei Ye Yu
- Department of Biomedical Sciences, Arthur A. Dugoni School of DentistryUniversity of the Pacific San Francisco CA USA
| | - Dawei Liu
- Department of Anatomy and Cell Biology, School of Dental MedicineUniversity of the Pennsylvania Philadelphia PA USA
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17
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He L, Liu H, Shi L, Pan S, Yang X, Zhang L, Niu Y. Expression and localization of special AT-rich sequence binding protein 2 in murine molar development and the pulp-dentin complex of human healthy teeth and teeth with pulpitis. Exp Ther Med 2017; 14:3507-3512. [PMID: 29042940 PMCID: PMC5639343 DOI: 10.3892/etm.2017.4980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 06/13/2017] [Indexed: 12/17/2022] Open
Abstract
Special AT-rich sequence binding protein 2 (SATB2) is a member of the special family of AT-rich binding transcription factors and has a critical role in osteoblast differentiation and craniofacial patterning. However, the expression and distribution of SATB2 in tooth development is largely unknown. The aim of the present study was to detect the expression and distribution of SATB2 during murine molar development and, in human healthy teeth and teeth with pulpitis using immunohistochemistry. Molars were obtained from Kunming mice at embryonic day (E) 13.5, E14.5, E16.5 and E18.5, and postnatal day (P) 1, P5 and P7. In addition, 20 human teeth (10 healthy and 10 teeth with pulpitis) were obtained from young adult patients (age, 24.90±1.65 years) who were scheduled for routine extraction. Immunohistochemical analyses were performed to detect the expression and distribution of SATB2. The present results revealed that SATB2 exhibits a spatiotemporal expression pattern in murine molar development and was expressed in odontoblasts, predentin, dental pulp cells and the blood vessels in human teeth. These findings suggested that SATB2 may have an important role in odontoblast differentiation and dentin matrix mineralization during tooth development.
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Affiliation(s)
- Lina He
- Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Huimei Liu
- Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Lei Shi
- Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Shuang Pan
- Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Xu Yang
- Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Lin Zhang
- Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yumei Niu
- Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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18
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Zeng Q, Nguyen S, Zhang H, Chebrolu HP, Alzebdeh D, Badi MA, Kim JR, Ling J, Yang M. Release of Growth Factors into Root Canal by Irrigations in Regenerative Endodontics. J Endod 2017; 42:1760-1766. [PMID: 27871480 DOI: 10.1016/j.joen.2016.04.029] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/11/2016] [Accepted: 04/20/2016] [Indexed: 12/18/2022]
Abstract
INTRODUCTION The aim of this study was to investigate the release of growth factors into root canal space after the irrigation procedure of regenerative endodontic procedure. METHODS Sixty standardized root segments were prepared from extracted single-root teeth. Nail varnish was applied to all surfaces except the root canal surface. Root segments were irrigated with 1.5% NaOCl + 17% EDTA, 2.5% NaOCl + 17% EDTA, 17% EDTA, or deionized water. The profile of growth factors that were released after irrigation was studied by growth factor array. Enzyme-linked immunosorbent assay was used to validate the release of transforming growth factor (TGF)-β1 and basic fibroblast growth factor (bFGF) at 4 hours, 1 day, and 3 days after irrigation. The final concentrations were calculated on the basis of the root canal volume measured by cone-beam computed tomography. Dental pulp stem cell migration on growth factors released from root segments was measured by using Transwell assay. RESULTS Total of 11 of 41 growth factors were detected by growth factors array. Enzyme-linked immunosorbent assay showed that TGF-β1 was released in all irrigation groups. Compared with the group with 17% EDTA (6.92 ± 4.49 ng/mL), the groups with 1.5% NaOCl + 17% EDTA and 2.5% NaOCl + 17% EDTA had significantly higher release of TGF-β1 (69.04 ± 30.41 ng/mL and 59.26 ± 3.37 ng/mL, respectively), with a peak release at day 1. The release of bFGF was detected at a low level in all groups (0 ng/mL to 0.43 ± 0.22 ng/mL). Migration assay showed the growth factors released from root segments induced dental pulp stem cell migration. CONCLUSIONS The root segment model in present study simulated clinical scenario and indicated that the current irrigation protocol released a significant amount of TGF-β1 but not bFGF. The growth factors released into root canal space induced dental pulp stem cell migration.
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Affiliation(s)
- Qian Zeng
- Operative Dentistry and Endodontics, Guanghua School of Stomatology, Affiliated Stomatological Hospital, Guangdong Province Key Laboratory of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Sean Nguyen
- Department of Endodontology, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania
| | - Hongming Zhang
- Department of Endodontology, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania
| | - Hari Priya Chebrolu
- Department of Endodontology, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania
| | - Dalia Alzebdeh
- Regenerative Health Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania
| | - Mustafa A Badi
- Division of Oral and Maxillofacial Radiology, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania
| | - Jong Ryul Kim
- Department of Endodontology, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania
| | - Junqi Ling
- Guanghua School of Stomatology, Affiliated Stomatological Hospital, Guangdong Province Key Laboratory of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China.
| | - Maobin Yang
- Department of Endodontology, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania.
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A Novel Strategy to Engineer Pre-Vascularized Full-Length Dental Pulp-like Tissue Constructs. Sci Rep 2017; 7:3323. [PMID: 28607361 PMCID: PMC5468292 DOI: 10.1038/s41598-017-02532-3] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 04/12/2017] [Indexed: 01/10/2023] Open
Abstract
The requirement for immediate vascularization of engineered dental pulp poses a major hurdle towards successful implementation of pulp regeneration as an effective therapeutic strategy for root canal therapy, especially in adult teeth. Here, we demonstrate a novel strategy to engineer pre-vascularized, cell-laden hydrogel pulp-like tissue constructs in full-length root canals for dental pulp regeneration. We utilized gelatin methacryloyl (GelMA) hydrogels with tunable physical and mechanical properties to determine the microenvironmental conditions (microstructure, degradation, swelling and elastic modulus) that enhanced viability, spreading and proliferation of encapsulated odontoblast-like cells (OD21), and the formation of endothelial monolayers by endothelial colony forming cells (ECFCs). GelMA hydrogels with higher polymer concentration (15% w/v) and stiffness enhanced OD21 cell viability, spreading and proliferation, as well as endothelial cell spreading and monolayer formation. We then fabricated pre-vascularized, full-length, dental pulp-like tissue constructs by dispensing OD21 cell-laden GelMA hydrogel prepolymer in root canals of extracted teeth and fabricating 500 µm channels throughout the root canals. ECFCs seeded into the microchannels successfully formed monolayers and underwent angiogenic sprouting within 7 days in culture. In summary, the proposed approach is a simple and effective strategy for engineering of pre-vascularized dental pulp constructs offering potentially beneficial translational outcomes.
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20
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Characterization of Dental Pulp Myofibroblasts in Rat Molars after Pulpotomy. J Endod 2017; 43:1116-1121. [PMID: 28527846 DOI: 10.1016/j.joen.2017.02.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 01/31/2017] [Accepted: 02/24/2017] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Myofibroblasts express alpha smooth muscle actin (α-SMA) and play a critical role in wound healing. Myofibroblast differentiation is controlled by the joint actions of transforming growth factor beta 1 (TGF-β1) and the extradomain A fibronectin splice variant (EDA-FN). Currently, the contribution of myofibroblasts to dental pulp healing is unknown. Therefore, we analyzed expressional characteristics of α-SMA-positive cells and investigated TGF-β1, EDA-FN, and α-SMA expression levels after pulpotomy to better understand dental pulp healing. METHODS The maxillary first molars of 8-week-old Wistar rats were pulpotomized with mineral trioxide aggregate. After 1 to 14 days, localization and colocalization of α-SMA, rat endothelial cell antigen-1 (as a marker of endothelial cells), neuron-glial antigen 2 (as a marker of perivascular cells), prolyl-4-hydroxylase (P4H, as an additional marker of myofibroblasts), and EDA-FN were analyzed using immunohistochemistry and double immunofluorescence. Time-course changes in the messenger RNA expression levels of TGF-β1, EDA-FN, and α-SMA were evaluated using quantitative real-time polymerase chain reaction analysis. RESULTS Spindle-shaped α-SMA-positive cells transiently appeared after pulpotomy. These cells initially emerged in the pulp core on day 3 and then accumulated at the wound site by day 5. These cells were isolated from rat endothelial cell antigen-1 positive cells and did not express neuron-glial antigen 2 but did express P4H. The messenger RNA levels of TGF-β1, EDA-FN, and α-SMA were significantly up-regulated after pulpotomy. EDA-FN and α-SMA were colocalized at the wound sites on day 5. CONCLUSIONS In association with up-regulation of TGF-β1 and EDA-FN expression, α-SMA and P4H double-positive cells accumulated at the wound sites after pulpotomy. This suggests that myofibroblasts participate in dental pulp healing.
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Mitsiadis TA, Magloire H, Pagella P. Nerve growth factor signalling in pathology and regeneration of human teeth. Sci Rep 2017; 7:1327. [PMID: 28465581 PMCID: PMC5431060 DOI: 10.1038/s41598-017-01455-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 03/30/2017] [Indexed: 12/25/2022] Open
Abstract
Nerve growth factor (NGF) is a key regulator of the development and differentiation of neuronal and non-neuronal cells. In the present study we examined the distribution of NGF and its low and high-affinity receptors, p75NTR and TrkA respectively, in permanent human teeth under normal and pathological conditions. In intact functional teeth, NGF, p75NTR and TrkA are weakly expressed in dental pulp fibroblasts and odontoblasts that are responsible for dentine formation, while the NGF and p75NTR molecules are strongly expressed in nerve fibres innervating the dental pulp. In carious and injured teeth NGF and TrkA expression is upregulated in a selective manner in odontoblasts surrounding the injury sites, indicating a link between NGF signalling and dental tissue repair events. Accordingly, NGF and TrkA expression is strongly upregulated in cultured primary human dental mesenchymal cells during their differentiation into odontoblasts. Targeted release of NGF in cultured human tooth slices induced extensive axonal growth and migration of Schwann cells towards the NGF administration site. These results show that NGF signalling is strongly linked to pathological and regenerative processes in human teeth and suggest a potential role for this neurotrophic molecule in pulp regeneration.
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Affiliation(s)
- Thimios A Mitsiadis
- Orofacial Development and Regeneration, Institute of Oral Biology, Centre for Dental Medicine, Medical Faculty, University of Zurich, Zurich, Switzerland.
| | - Henry Magloire
- Institut de Génomique Fonctionnelle de Lyon, Ecole Normale Supérieure (ENS), Lyon, France
| | - Pierfrancesco Pagella
- Orofacial Development and Regeneration, Institute of Oral Biology, Centre for Dental Medicine, Medical Faculty, University of Zurich, Zurich, Switzerland
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Chang MC, Chang HH, Lin PS, Huang YA, Chan CP, Tsai YL, Lee SY, Jeng PY, Kuo HY, Yeung SY, Jeng JH. Effects of TGF-β1 on plasminogen activation in human dental pulp cells: Role of ALK5/Smad2, TAK1 and MEK/ERK signalling. J Tissue Eng Regen Med 2017; 12:854-863. [PMID: 27723266 DOI: 10.1002/term.2339] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 07/30/2016] [Accepted: 09/26/2016] [Indexed: 11/07/2022]
Abstract
Transforming growth factor-β1 (TGF-β1) plays an important role in the pulpal repair and dentinogenesis. Plasminogen activation (PA) system regulates extracellular matrix turnover. In this study, we investigated the effects of TGF-β1 on PA system of dental pulp cells and its signalling pathways. Dental pulp cells were treated with different concentrations of TGF-β1. MTT assay, reverse transcription-polymerase chain reaction, Western blotting and enzyme-linked immunosorbant assay (ELISA) were used to detect the effect of TGF-β1 on cell viability, mRNA and protein expression of urokinase-type plasminogen activator (uPA), uPA receptor (uPAR), plasminogen activator inhibitor-1 (PAI-1) as well as their secretion. The phosphorylation of Smad2 and TAK1 was analysed by Pathscan ELISA or Western blotting. Cells were pretreated with SB431542 (ALK5/Smad2/3 inhibitor), 5z-7-oxozeaenol (TAK1 inhibitor) and U0126 (MEK/ERK inhibitor) for examining the related signalling. TGF-β1 slightly inhibited cell growth that was reversed by SB431542. TGF-β1 upregulated both RNA and protein expression of PAI-1 and uPAR, whereas it downregulated uPA expression. Accordingly, TGF-β1 stimulated PAI-1 and soluble uPAR (suPAR) secretion of pulp cells, whereas uPA secretion was inhibited. TGF-β1 induced the phosphorylation of Smad2 and TAK1. In addition, SB431542, 5z-7-oxozeaenol and U0126 attenuated the TGF-β1-induced secretion of PAI-1 and suPAR. These results indicate that TGF-β1 is possibly involved in the repair/regeneration and inflammatory processes of dental pulp via regulation of PAI-1, uPA and uPAR. These effects of TGF-β1 are related to activation of ALK5/Smad2, TAK1 and MEK/ERK signalling pathways. Clarifying the signal transduction for the effects of TGF-β1 is helpful for pulpo-dentin regeneration and tissue engineering. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Mei-Chi Chang
- Biomedical Science Team and Research Center for Industry of Human Ecology, Chang Gung University of Science and Technology, Kwei-Shan, Taoyuan City, Taiwan.,Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Hsiao-Hua Chang
- Laboratory of Dental Pharmacology, Toxicology & Material Biocompatibility, Graduate Institute of Clinical Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
| | - Po-Shuan Lin
- Laboratory of Dental Pharmacology, Toxicology & Material Biocompatibility, Graduate Institute of Clinical Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
| | - Yu-An Huang
- Laboratory of Dental Pharmacology, Toxicology & Material Biocompatibility, Graduate Institute of Clinical Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
| | - Chiu-Po Chan
- Department of Dentistry and School of Dentistry, Taipei Medical University, Taipei, Taiwan
| | - Yi-Ling Tsai
- Laboratory of Dental Pharmacology, Toxicology & Material Biocompatibility, Graduate Institute of Clinical Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
| | - Shen-Yang Lee
- Department of Dentistry and School of Dentistry, Taipei Medical University, Taipei, Taiwan
| | - Po-Yuan Jeng
- School of Dentistry, University CEU, Cardenal Herrera, Valencia, Spain
| | - Han-Yueh Kuo
- Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu Branch, Taiwan
| | - Sin-Yuet Yeung
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Jiiang-Huei Jeng
- Laboratory of Dental Pharmacology, Toxicology & Material Biocompatibility, Graduate Institute of Clinical Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
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Botelho J, Cavacas MA, Borrecho G, Polido M, Oliveira P, Martins Dos Santos J. Human ex vivo dentin-pulp complex preservation in a full crown model. J Oral Biol Craniofac Res 2017; 7:19-22. [PMID: 28316916 DOI: 10.1016/j.jobcr.2016.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 12/11/2016] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Currently, there is lack of human in vitro full tooth models that hold the odontoblast layer with pulp tissue in their native environment. The appearance of new in vitro and in vivo models has provided new understanding of the potential of tissue engineering in dental pulp regeneration. However, the development of new in vitro full tooth models will allow us to get closer to in vivo conditions. Thus, the aim of this study is to preserve a living dentin-pulp complex, in a novel in vitro full crown model, after tooth extraction. METHODS Twenty intact third molars, after preparation, were divided into four groups, with five samples each. We placed the negative control samples (C) in saline, and the tested groups were placed (T) in supplemented DMEM, at two different times: 1 and 7 days. The specimens were processed for light microscopy observation. RESULTS Contrary to C-groups, T-groups showed a functional dentin-pulp complex. The treated dentin-pulp complex presents normal histological appearance. CONCLUSIONS This study showed that it is possible to preserve a living dentin-pulp complex after tooth extraction during 7 days.
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Affiliation(s)
- João Botelho
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Maria Alzira Cavacas
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Gonçalo Borrecho
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Mário Polido
- Instituto Superior de Ciências da Saúde Egas Moniz, Dental Materials Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Pedro Oliveira
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - José Martins Dos Santos
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
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Abstract
Regenerative endodontic treatment has yielded excellent clinical outcomes, but only several animal studies have shown the robust regeneration of the pulp-dentin complex. The biological molecules, if properly delivered, can enkindle regeneration of dental pulp and dentin rather than repair with tissues of periodontal origin. This review details the biological significance of regenerating the pulp-dentin complex, the effects of biological cues in pulp regeneration, and the delivery strategies of biological molecules to enhance the outcomes of regenerative endodontic therapy.
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Affiliation(s)
- Sahng G Kim
- Division of Endodontics, College of Dental Medicine, Columbia University, 630 West 168 Street, PH7Stem128, New York, NY 10032, USA.
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Mitsiadis TA, Rahiotis C. Parallels between Tooth Development and Repair: Conserved Molecular Mechanisms following Carious and Dental Injury. J Dent Res 2016; 83:896-902. [PMID: 15557394 DOI: 10.1177/154405910408301202] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The reparative mechanisms that operate following carious and traumatic dental injury are critical for pulp survival and involve a series of highly conserved processes. It appears that these processes share genetic programs—linked to cytoskeletal organization, cell movement, and differentiation—that occur throughout embryogenesis. Reactionary dentin is secreted by surviving odontoblasts in response to moderate stimuli, leading to an increase in metabolic activity. In severe injury, necrotic odontoblasts are replaced by other pulp cells, which are able to differentiate into odontoblast-like cells and produce a reparative dentin. This complex process requires the collaborative efforts of cells of different lineage. The behavior of each of the contributing cell types during the phases of proliferation, migration, and matrix synthesis as well as details of how growth factors control wound cell activities are beginning to emerge. In this review, we discuss what is known about the molecular mechanisms involved in dental repair.
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Affiliation(s)
- T A Mitsiadis
- Department of Craniofacial Development, GKT Dental Institute, King's College, Guy's Hospital, London, UK.
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Transforming growth factor beta 1 increases collagen content, and stimulates procollagen I and tissue inhibitor of metalloproteinase-1 production of dental pulp cells: Role of MEK/ERK and activin receptor-like kinase-5/Smad signaling. J Formos Med Assoc 2016; 116:351-358. [PMID: 27720345 DOI: 10.1016/j.jfma.2016.07.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 07/05/2016] [Accepted: 07/07/2016] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND/PURPOSE In order to clarify the role of transforming growth factor beta 1 (TGF-β1) in pulp repair/regeneration responses, we investigated the differential signaling pathways responsible for the effects of TGF-β1 on collagen turnover, matrix metalloproteinase-3 (MMP-3), and tissue inhibitor of metalloproteinase-1 (TIMP-1) production in human dental pulp cells. METHODS Pulp cells were exposed to TGF-β1 with/without pretreatment and coincubation by 1,4-diamino-2,3-dicyano-1,4-bis(o-aminophenyl mercapto)butadiene (U0126; a mitogen-activated protein kinase kinase [MEK]/extracellular signal-regulated kinase [ERK] inhibitor) and 4-(5-benzol[1,3]dioxol-5-yl-4-pyrldin-2-yl-1H- imidazol-2-yl)-benzamide hydrate (SB431542; an activin receptor-like kinase-5/Smad signaling inhibitor). Sircol collagen assay was used to measure cellular collagen content. Culture medium procollagen I, TIMP-1, and MMP-3 levels were determined by enzyme-linked immunosorbent assay. RESULTS TGF-β1 increased the collagen content, procollagen I, and TIMP-1 production, but slightly decreased MMP-3 production of pulp cells. SB431542 and U0126 prevented the TGF-β1-induced increase of collagen content and TIMP-1 production of dental pulp cells. CONCLUSION These results indicate that TGF-β1 may be involved in the healing/regeneration processes of dental pulp in response to injury by stimulation of collagen and TIMP-1 production. These events are associated with activin receptor-like kinase-5/Smad2/3 and MEK/ERK signaling.
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Assessment and Quantification of Noncollagenic Matrix Proteins Released from Human Dentin Powder Incorporated into a Silated Hydroxypropylmethylcellulose Biomedical Hydrogel. J Endod 2016; 42:1371-6. [DOI: 10.1016/j.joen.2016.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 05/11/2016] [Accepted: 05/23/2016] [Indexed: 11/23/2022]
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Bellamy C, Shrestha S, Torneck C, Kishen A. Effects of a Bioactive Scaffold Containing a Sustained Transforming Growth Factor-β1-releasing Nanoparticle System on the Migration and Differentiation of Stem Cells from the Apical Papilla. J Endod 2016; 42:1385-92. [PMID: 27484250 DOI: 10.1016/j.joen.2016.06.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 04/29/2016] [Accepted: 06/16/2016] [Indexed: 12/18/2022]
Abstract
INTRODUCTION This 2-part study hypothesized that a bioactive scaffold containing a sustained transforming growth factor (TGF)-β1-releasing nanoparticle system will promote migration and enhance differentiation of stem cells from the apical papilla (SCAP). The study aimed to develop and characterize a novel modified chitosan-based scaffold containing TGF-β1-releasing chitosan nanoparticles (TGF-β1-CSnp) to enhance migration and differentiation of SCAP. METHODS Part I concerns the synthesis and characterization of a carboxymethyl chitosan-based scaffold and TGF-β1-CSnp. Part II examines the effect of sustained TGF-β1 release from scaffold containing TGF-β1-CSnp on odontogenic differentiation of SCAP. RESULTS The scaffold demonstrated properties conducive to cellular activities. The incorporation of TGF-β1 in CSnp allowed sustained release of TGF-β1, facilitating delivery of a critical concentration of TGF-β1 at the opportune time. TGF-β1 bioactivity was maintained for up to 4 weeks. SCAP showed greater viability, migration, and biomineralization in the presence of TGF-β1-CSnp than in the presence of free TGF-β1. SCAP cultured in TGF-β1-CSnp + scaffold showed significantly higher dentin matrix protein-1 and dentin sialophosphoprotein signals compared with free TGF-β1 + scaffold or CSnp + scaffold. CONCLUSIONS These experiments highlighted the potential of a carboxymethyl chitosan-based scaffold with growth factor releasing nanoparticles to promote migration and differentiation of SCAP. The results of this study may have direct application to improve current endodontic regenerative protocols.
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Affiliation(s)
- Craig Bellamy
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Suja Shrestha
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Calvin Torneck
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Anil Kishen
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
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Widbiller M, Eidt A, Hiller KA, Buchalla W, Schmalz G, Galler KM. Ultrasonic activation of irrigants increases growth factor release from human dentine. Clin Oral Investig 2016; 21:879-888. [DOI: 10.1007/s00784-016-1824-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 04/13/2016] [Indexed: 11/24/2022]
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Tabatabaei FS, Torshabi M. Effects of Non-Collagenous Proteins, TGF-β1, and PDGF-BB on Viability and Proliferation of Dental Pulp Stem Cells. EJOURNAL OF ORAL MAXILLOFACIAL RESEARCH 2016; 7:e4. [PMID: 27099698 PMCID: PMC4837608 DOI: 10.5037/jomr.2016.7104] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 03/22/2016] [Indexed: 12/17/2022]
Abstract
Objectives The dentin matrix servers as a reservoir of growth factors, sequestered during dentinogenesis. The aim of this study was to assess the viability and proliferation of dental pulp stem cells in the presence of dentin matrix-derived non-collagenous proteins and two growth factors; platelet-derived growth factor BB and transforming growth factor beta 1. Material and Methods The dental pulp cells were isolated and cultured. The dentin proteins were extracted and purified. The MTT assay was performed for assessment of cell viability and proliferation in the presence of different concentrations of dentin proteins and growth factors during 24 - 72 h post-treatment. Results The cells treated with 250 ng/mL dentin proteins had the best viability and proliferation ability in comparison with other concentrations (P < 0.05). The MTT assay demonstrated that cells cultured with 5 ng/mL platelet-derived growth factor BB had the highest viability at each time point as compared to other groups (P < 0.05). However, in presence of platelet-derived growth factor BB alone and in combination with transforming growth factor beta 1 and dentin proteins (10 ng/mL), significant higher viability was seen at all time points (P < 0.05). The least viability and proliferation at each growth factor concentration was seen in cells treated with combination of transforming growth factor beta 1 and dentin proteins at 72 h (P < 0.05). Conclusions The results indicated that the triple combination of growth factors and matrix-derived non-collagenous proteins (especially at 10 ng/mL concentration) has mitogenic effect on dental pulp stem cells.
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Affiliation(s)
- Fahimeh Sadat Tabatabaei
- Department of Dental Biomaterials, School of Dentistry, Shahid Beheshti University of Medical sciencesIran.; Department of Tissue Engineering, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical SciencesIran
| | - Maryam Torshabi
- Department of Dental Biomaterials, School of Dentistry, Shahid Beheshti University of Medical sciencesIran.; Department of Tissue Engineering, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical SciencesIran
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Galler KM, Widbiller M, Buchalla W, Eidt A, Hiller KA, Hoffer PC, Schmalz G. EDTA conditioning of dentine promotes adhesion, migration and differentiation of dental pulp stem cells. Int Endod J 2015; 49:581-90. [DOI: 10.1111/iej.12492] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 06/19/2015] [Indexed: 01/20/2023]
Affiliation(s)
- K. M. Galler
- Department of Conservative Dentistry and Periodontology; University Medical Center; Regensburg Germany
| | - M. Widbiller
- Department of Conservative Dentistry and Periodontology; University Medical Center; Regensburg Germany
| | - W. Buchalla
- Department of Conservative Dentistry and Periodontology; University Medical Center; Regensburg Germany
| | - A. Eidt
- Department of Conservative Dentistry and Periodontology; University Medical Center; Regensburg Germany
| | - K. -A. Hiller
- Department of Conservative Dentistry and Periodontology; University Medical Center; Regensburg Germany
| | - P. C. Hoffer
- Department of Conservative Dentistry and Periodontology; University Medical Center; Regensburg Germany
| | - G. Schmalz
- Department of Conservative Dentistry and Periodontology; University Medical Center; Regensburg Germany
- School of Dental Medicine; ZMK Bern; University of Bern; Bern Switzerland
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Galler KM, Buchalla W, Hiller KA, Federlin M, Eidt A, Schiefersteiner M, Schmalz G. Influence of Root Canal Disinfectants on Growth Factor Release from Dentin. J Endod 2015; 41:363-8. [DOI: 10.1016/j.joen.2014.11.021] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 11/07/2014] [Accepted: 11/21/2014] [Indexed: 01/23/2023]
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Zhang M, Kokabu S, Nakatomi C, Sugiyama G, Matsuo K, Jimi E. The distinct distributions of immunocompetent cells in rat dentin pulp after pulpotomy. Anat Rec (Hoboken) 2014; 298:741-9. [PMID: 25371095 DOI: 10.1002/ar.23087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 10/20/2014] [Indexed: 11/07/2022]
Abstract
Pulpotomy involves the removal of the coronal portion of pulp, including the diseased tissue, with the intent of maintaining the vitality of the remaining pulpal tissue via a therapeutic dressing. Once odontoblasts suffer injuries, the differentiation of mesenchymal cells is induced from the precursor cell population in the dental pulp, and these cells are recruited to the injured site to differentiate into odontoblasts. However, the involvement of immunocompetent cells during pulpal regeneration remains unclear. Thus, the purpose of this study was to investigate the properties of macrophages that infiltrated wound healing sites in rats between 1 and 28 days after pulpotomy (dap). During the inflammatory phase, ED1(+) (CD68(+) ) macrophages significantly increased throughout root pulp, especially apical to the demarcation zone, and this population persisted until 3 dap before decreasing gradually until 28 dap. OX6(+) macrophages expressing class II MHC also increased in the apical pulp at 1 dap and declined thereafter. However, OX6(+) cells appeared prior to dentin bridge formation at 3 dap and appeared again apical to the dentin bridge during the healing stage at 14 dap. The shift from ED1(+) cells in the inflammation phase to OX6(+) cells during dentin bridge formation might contribute to wound healing.
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Affiliation(s)
- Min Zhang
- Division of Oral Pathology, Department of Health Promotion, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, Fukuoka, 803-8580, Japan
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Takei E, Shigetani Y, Yoshiba K, Hinata G, Yoshiba N, Okiji T. Initial transient accumulation of M2 macrophage-associated molecule-expressing cells after pulpotomy with mineral trioxide aggregate in rat molars. J Endod 2014; 40:1983-8. [PMID: 25282378 DOI: 10.1016/j.joen.2014.08.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 08/08/2014] [Accepted: 08/12/2014] [Indexed: 12/31/2022]
Abstract
INTRODUCTION M2 (alternatively activated) macrophages are known to participate in wound healing and tissue repair. This study aimed to analyze the temporospatial changes in the distribution and density of M2 macrophage-associated molecule-expressing cells after pulpotomy with mineral trioxide aggregate (MTA) in rat molars to ascertain the role played by M2 macrophages in the healing of MTA-capped pulp tissue. METHODS The maxillary first molars of 8-week-old Wistar rats were pulpotomized and capped with MTA. After 1-14 days, the teeth were examined after hematoxylin-eosin staining or immunoperoxidase staining of CD68 (a general macrophage marker) and M2 macrophage markers (CD163 and CD204). The density of positively stained cells was enumerated in the surface and inner regions (0-100 μm and 300-400 μm, respectively, from the wound surface). RESULTS MTA capping initially caused mild inflammatory changes and the formation of a degenerative layer followed by progressive new matrix formation and calcified bridging. At 1-2 days, CD68-, CD163-, and CD204-positive cells started to accumulate beneath the degenerative layer, and the density of these cells was significantly higher in the surface region than in the inner region (P < .05). From 7 days onward, the 3 types of cells displayed an almost normal distribution beneath the newly formed dentinlike matrix. CONCLUSIONS After the pulpotomy of rat molars with MTA, M2 macrophage-associated molecule-expressing cells transiently accumulated beneath the degenerative layer under the MTA. This suggests that M2 macrophages participate in the initial phases of the healing of MTA-capped pulp tissue.
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MESH Headings
- Aluminum Compounds/pharmacology
- Animals
- Antigens, CD/analysis
- Antigens, CD/drug effects
- Antigens, Differentiation, Myelomonocytic/analysis
- Antigens, Differentiation, Myelomonocytic/drug effects
- Calcium Compounds/pharmacology
- Cell Count
- Dentin, Secondary/drug effects
- Drug Combinations
- Macrophage Activation/drug effects
- Macrophages/drug effects
- Odontoblasts/drug effects
- Oxides/pharmacology
- Pulp Capping and Pulpectomy Agents/pharmacology
- Pulpotomy/methods
- Rats
- Rats, Wistar
- Receptors, Cell Surface/analysis
- Receptors, Cell Surface/drug effects
- Scavenger Receptors, Class A/analysis
- Scavenger Receptors, Class A/drug effects
- Silicates/pharmacology
- Time Factors
- Wound Healing/drug effects
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Affiliation(s)
- Erika Takei
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yoshimi Shigetani
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Kunihiko Yoshiba
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Go Hinata
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Nagako Yoshiba
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Takashi Okiji
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
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Dental pulp stem cells' secretome enhances pulp repair processes and compensates TEGDMA-induced cytotoxicity. Dent Mater 2014; 30:e405-18. [PMID: 25241918 DOI: 10.1016/j.dental.2014.08.377] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 08/04/2014] [Accepted: 08/29/2014] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Aim of this study was to investigate the effects of dental pulp stem cells' (DPSCs) secretome, expressed through their culture conditioned medium (CM), on biological endpoints related to pulp repair and on TEGDMA-induced cytotoxicity. METHODS DPSCs cultures were established and characterized for stem cell markers with flow cytometry. CM was collected from DPSCs under serum deprivation conditions (SDC) and normal serum conditions (NSC) at various time-points. CM effects on DPSCs viability, migration and mineralization potential were evaluated by MTT assay, transwell insert and in vitro scratch assay and Alizarin Red staining/quantification respectively. TEGDMA (0.25-2.0mM) cytotoxicity regarding the same biological endpoints was tested in the presence/absence of CM. TGF-β1 and FGF-2 secretion in CM was measured by ELISA. RESULTS CM collected under SDC (4d) was able to increase cell viability by 20-25% and to reduce TEGDMA cytotoxicity by 20% (p<0.05). CM positive effects were not obvious when collected under NSC. Transwell assay showed significant increase (26%, p<0.05) of DPSCs' migration after CM exposure, whereas both migration assays could not support a migration rate improvement in TEGDMA-treated cultures exposed to CM compared to TEGDMA alone. CM significantly (p<0.01) increased DPSCs mineralization potential and completely counteracted TEGDMA cytotoxicity on this process. ELISA analysis showed a time-dependent increase of TGF-β1 and a TEGDMA concentration-dependent increase of both TGF-β1 and FGF-2 in CM. SIGNIFICANCE These findings suggest that DPSCs secretome increases their viability, migration and mineralization potential and counteracts TEGDMA-induced cytotoxicy, revealing a novel mechanism of DPSCs autocrine signaling on pulp repair processes.
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Shotgun proteomics analysis of proliferating STRO-1-positive human dental pulp cell after exposure to nacreous water-soluble matrix. Clin Oral Investig 2014; 19:261-70. [PMID: 24923583 DOI: 10.1007/s00784-014-1256-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Accepted: 05/12/2014] [Indexed: 12/12/2022]
Abstract
INTRODUCTION For dental treatment, dentin regeneration is required after a tooth injury with dental pulp exposure. The effects of the water-soluble matrix (WSM) extracted from the nacreous layer of the bivalve Pinctada maxima on human dental pulp cells in vitro were challenging and useful for clinical application. MATERIAL AND METHODS The biological activity of the STRO-1-positive human dental pulp cells in response to WSM compared to Dulbecco's modified Eagle medium (DMEM) as a normal control was monitored. The cell survival rate was analyzed by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Proteomic profiles among inducers and noninducers with time dependency were compared by using sodium dodecyl sulfate-polyacrylamide gel electrophoresis combined with liquid chromatography-tandem mass spectrometry (GeLC-MS/MS). RESULTS The human dental pulp cells cultured in nacreous WSM exhibited higher relative cell viability than those in DMEM with similar morphological appearance. Significant changes were found in the relative abundance of 44 proteins in cells after exposure to WSM for 2 weeks. They play a role in cell adhesion, cell proliferation, metabolic process, signal transduction, stress response, transcription, translation, and transport. CONCLUSION These results indicate that WSM of P. maxima has the ability to induce proliferation of human dental pulp cells. CLINICAL RELEVANCE This finding initiated the study to evaluate the suitability of nacre as biomaterial for dentistry.
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Althumairy RI, Teixeira FB, Diogenes A. Effect of Dentin Conditioning with Intracanal Medicaments on Survival of Stem Cells of Apical Papilla. J Endod 2014; 40:521-5. [DOI: 10.1016/j.joen.2013.11.008] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 11/06/2013] [Accepted: 11/07/2013] [Indexed: 10/25/2022]
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Sriarj W, Aoki K, Ohya K, Takahashi M, Takagi Y, Shimokawa H. TGF-β in dentin matrix extract induces osteoclastogenesis in vitro. Odontology 2013; 103:9-18. [PMID: 24366403 DOI: 10.1007/s10266-013-0140-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 11/20/2013] [Indexed: 01/03/2023]
Abstract
Previously, we have demonstrated that the extracellular matrix from dentin affects osteoclastic activity in co-culture between osteoclast and osteoblast-rich fraction from mouse marrow cells. In the present study, we aimed to investigate the mechanisms of dentin matrix extract-induced osteoclastogenesis in mouse bone marrow macrophages (BMMs). Dentin proteins were extracted from bovine incisor root dentin using 0.6 M HCl. BMMs were cultured in α-MEM containing macrophage colony-stimulating factor/receptor activator of nuclear factor kappa-B ligand in the presence or absence of dentin matrix extract. Tartrate-resistant acid phosphatase (TRAP)-positive cell number, total TRAP activity, and the mRNA levels of osteoclast-related genes, assayed by real-time RT-PCR, were determined as markers of osteoclastogenesis. A neutralizing antibody against transforming growth factor-β1 (TGF-β1), SB431542, a TGF-β receptor inhibitor, and ELISA were used to determine the role of TGF-β1. We observed increases in TRAP-positive cell number, TRAP activity, and the mRNA levels of osteoclast-related genes of BMMs cultured with dentin extract. The use of a neutralizing antibody against TGF-β1 or SB431542 inhibited the inductive effect of dentin extract, suggesting TGF-β1 involvement. The addition of exogenous TGF-β1, but not bone morphogenic protein-2, also increased osteoclastogenesis, corresponding to the ELISA determination of TGF-β1 in the dentin extract. In conclusion, our results indicate that proteins from dentin matrix have an inductive effect in osteoclastogenesis, which is mediated, in part, by TGF-β1.
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Affiliation(s)
- Wannakorn Sriarj
- Department of Pediatric Dentistry, Faculty of Dentistry, Chulalongkorn University, 34, Henri-Dunant Road, Pathumwan, Bangkok, 10330, Thailand,
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Teti G, Salvatore V, Ruggeri A, Manzoli L, Gesi M, Orsini G, Falconi M. In vitro reparative dentin: a biochemical and morphological study. Eur J Histochem 2013; 57:e23. [PMID: 24085272 PMCID: PMC3794354 DOI: 10.4081/ejh.2013.e23] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 06/24/2013] [Accepted: 06/27/2013] [Indexed: 01/28/2023] Open
Abstract
In this study, starting from human dental pulp cells cultured in vitro, we simulated reparative dentinogenesis using a medium supplemented with different odontogenic inductors. The differentiation of dental pulp cells in odontoblast-like cells was evaluated by means of staining, and ultramorphological, biochemical and biomolecular methods. Alizarin red staining showed mineral deposition while transmission electron microscopy revealed a synthesis of extracellular matrix fibers during the differentiation process. Biochemical assays demonstrated that the differentiated phenotype expressed odontoblast markers, such as Dentin Matrix Protein 1 (DMP1) and Dentin Sialoprotein (DSP), as well as type I collagen. Quantitative data regarding the mRNA expression of DMP1, DSP and type I collagen were obtained by Real Time PCR. Immunofluorescence data demonstrated the various localizations of DSP and DMP1 during odontoblast differentiation. Based on our results, we obtained odontoblast-like cells which simulated the reparative dentin processes in order to better investigate the mechanism of odontoblast differentiation, and dentin extracellular matrix deposition and mineralization.
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Cooper PR, Smith AJ. Molecular mediators of pulp inflammation and regeneration. ACTA ACUST UNITED AC 2013. [DOI: 10.1111/etp.12036] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Ruparel NB, de Almeida JFA, Henry MA, Diogenes A. Characterization of a Stem Cell of Apical Papilla Cell Line: Effect of Passage on Cellular Phenotype. J Endod 2013; 39:357-63. [DOI: 10.1016/j.joen.2012.10.027] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 10/17/2012] [Accepted: 10/18/2012] [Indexed: 01/09/2023]
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Kim SG, Zhou J, Solomon C, Zheng Y, Suzuki T, Chen M, Song S, Jiang N, Cho S, Mao JJ. Effects of growth factors on dental stem/progenitor cells. Dent Clin North Am 2013; 56:563-75. [PMID: 22835538 DOI: 10.1016/j.cden.2012.05.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The primary goal of regenerative endodontics is to restore the vitality and functions of the dentin-pulp complex, as opposed to filing of the root canal with bioinert materials. A myriad of growth factors regulates multiple cellular functions including migration, proliferation, differentiation, and apoptosis of several cell types intimately involved in dentin-pulp regeneration. Recent work showing that growth factor delivery, without cell transplantation, can yield pulp-dentin-like tissues in vivo provides one of the tangible pathways for regenerative endodontics. This review synthesizes knowledge on many growth factors that are known or anticipated to be efficacious in dental pulp-dentin regeneration.
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Affiliation(s)
- Sahng G Kim
- Center for Craniofacial Regeneration, Columbia University, 630 West 168 Street, PH7E, New York, NY 10032, USA
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Magloire H, Couble ML, Romeas A, Bleicher F. Odontoblast primary cilia: facts and hypotheses. Cell Biol Int 2013; 28:93-9. [PMID: 14984754 DOI: 10.1016/j.cellbi.2003.11.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2003] [Accepted: 11/04/2003] [Indexed: 11/22/2022]
Abstract
Odontoblasts, the cells responsible for the dentine formation, are organized as a single layer of highly polarized and differentiated post-mitotic cells along the interface between the dental pulp and the mineralized tubules. They lay down the physiological secondary dentine throughout the life of the teeth. Odontoblasts play a central role in the transportation of calcium to the dentine and they possibly mediate early stages of sensory processing in teeth. A primary cilium, 9+0 configuration, have been regularly identified in a supra nuclear location. Calbindin D28k has been detected at the base of the cilium membrane. The cilium structure was positive with detyrosinated alpha tubulin antibodies in vivo and in cultured human odontoblasts. Transcripts of tektin, a protein involved in ciliogenesis, were expressed in vitro. The putative role of the primary cilium constituting a critical link between external teeth stimuli and odontoblast responses is extensively discussed.
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Affiliation(s)
- Henry Magloire
- Laboratoire du Développement des tissus dentaires, EA 1892, IFR 62, Faculté d'Odontologie, rue G. Paradin, 69372 Lyon Cedex 08, France.
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Sangwan P, Sangwan A, Duhan J, Rohilla A. Tertiary dentinogenesis with calcium hydroxide: a review of proposed mechanisms. Int Endod J 2012; 46:3-19. [PMID: 22889347 DOI: 10.1111/j.1365-2591.2012.02101.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 06/25/2012] [Indexed: 11/30/2022]
Abstract
Calcium hydroxide has been used extensively in dentistry for a century. Despite its widespread use as a pulp-capping agent, its mechanisms of action still remain ambiguous. Understanding its modes of action will lead to a broader understanding of the mechanisms associated with induced dentinogenesis and help in optimizing the currently available agents to target specific regenerative processes to obtain the best possible clinical outcomes. A literature search relating to mechanisms of dentinogenesis of calcium hydroxide up to December 2011 was carried out using pubmed and MEDLINE database searches as well as manual searching of cross-references from identified studies. Resulting suggestions regarding dentinogenic mechanisms of calcium hydroxide range from direct irritating action of the material to induction of release of biologically active molecules. The purpose of this article is to discuss various mechanisms through which calcium hydroxide may induce tertiary dentinogenesis in the light of observations made in included studies.
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Affiliation(s)
- P Sangwan
- Department of Conservative Dentistry, Government Dental College, Pt. B.D. Sharma University of Health Sciences, Rohtak, Haryana, India.
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Mazzoni A, Breschi L, Carrilho M, Nascimento FD, Orsini G, Ruggeri A, Gobbi P, Manzoli L, Tay FR, Pashley DH, Tjäderhane L. A review of the nature, role, and function of dentin non-collagenous proteins. Part II: enzymes, serum proteins, and growth factors. ACTA ACUST UNITED AC 2012. [DOI: 10.1111/j.1601-1546.2012.00268.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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46
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Dentine as a bioactive extracellular matrix. Arch Oral Biol 2012; 57:109-21. [DOI: 10.1016/j.archoralbio.2011.07.008] [Citation(s) in RCA: 183] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 07/21/2011] [Accepted: 07/25/2011] [Indexed: 01/13/2023]
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Moriguchi M, Yamada M, Miake Y, Koshika M. Immunolocalization of Axin2 and p-Smad3 in Developing Rat Molar Germ. J HARD TISSUE BIOL 2012. [DOI: 10.2485/jhtb.21.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Li Y, Lü X, Sun X, Bai S, Li S, Shi J. Odontoblast-like cell differentiation and dentin formation induced with TGF-β1. Arch Oral Biol 2011; 56:1221-9. [DOI: 10.1016/j.archoralbio.2011.05.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 04/08/2011] [Accepted: 05/06/2011] [Indexed: 01/09/2023]
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Responses of BrdU label-retaining dental pulp cells to allogenic tooth transplantation into mouse maxilla. Histochem Cell Biol 2011; 136:649-61. [DOI: 10.1007/s00418-011-0868-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2011] [Indexed: 12/17/2022]
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50
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Cai X, Gong P, Huang Y, Lin Y. Notch signalling pathway in tooth development and adult dental cells. Cell Prolif 2011; 44:495-507. [PMID: 21973022 DOI: 10.1111/j.1365-2184.2011.00780.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Notch signalling is a highly conserved intercellular signal transfer mechanism that includes canonical and non-canonical pathways. It regulates differentiation and proliferation of stem/progenitor cells by means of para-inducing effects. Expression and activation of Notch signalling factors (receptors and ligands) are critical not only for development of the dental germ but also for regeneration of injured tissue associated with mature teeth. Notch signalling plays key roles in differentiation of odontoblasts and osteoblasts, calcification of tooth hard tissue, formation of cusp patterns and generation of tooth roots. After tooth eruption, Notch signalling can also be triggered in dental stem cells of the pulp, where it induces them to differentiate into odontoblasts, thus generating fresh dentine tissue. Other signalling pathways, such as TGFβ, NF-κB, Wnt, Fgf and Shh also interact with Notch signalling during tooth development.
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Affiliation(s)
- X Cai
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu
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